>>346
乱暴だけど答えは出る

#include <stdio.h>

void main(void)
{
FILE *fp;
char name[256], price[256], from[256];
int sum = 0;

fp = fopen("nurupo.txt", "r");
if(fp == NULL)
exit(0);

while( fscanf(fp, "%s %s %s", &name, &price, &from ) != EOF ){
sum += atoi( price );
}

printf( "合計:%d\n", sum );

fclose(fp);
}